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Vibration Modeling and Correlation of Driveline Boom for TFWD/AWD Crossover Vehicles
Technical Paper
2003-01-1495
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Reducing the high cost of hardware testing with analytical methods has been highly accelerated in the automotive industry. This paper discusses an analytical model to simulate the driveline boom test for the transverse engine with all wheel drive configuration on a front-wheel drive base (TFWD/AWD). Driveline boom caused by engine firing frequency that excites the bending mode of the propeller shaft becomes a noise and vibration issue for the design of TFWD/AWD driveline.
The major source of vibrations and noise under the investigation in this paper is the dominant 3rd order engine torque pulse disturbance that excites the bending of the propeller shaft, the bending of the powertrain and possible the bending of the rear halfshaft. All other excitation sources in this powertrain for a 60° V6 engine with a pushrod type valvetrain are assessed and NVH issues are also considered in this transient dynamic model. There exist the 2nd order unbalanced rotating couples (yaw and pitch respective to the engine coordinate system) due to the reciprocating mass of the pistons and connecting rods, and the 1½ order valvetrain unbalanced rolling moment (respective to the engine coordinate system).
A nonlinear Multi-body System Simulation (MSS) combined with a linear Finite Element Analysis (FEA) in time domain was used as a numerical tool for the evaluation of the mount vibrations at the propeller shaft center bearing at the suspected path for N&V. Finally, the TFWD/AWD boom analytical model was built using DADS* and validated with test results.
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Authors
Citation
Du, H., Frederiksen, M., and Happel, S., "Vibration Modeling and Correlation of Driveline Boom for TFWD/AWD Crossover Vehicles," SAE Technical Paper 2003-01-1495, 2003, https://doi.org/10.4271/2003-01-1495.Also In
SAE 2003 Transactions Journal of Passenger Cars - Mechanical Systems
Number: V112-6; Published: 2004-09-15
Number: V112-6; Published: 2004-09-15
References
- Shih, S. et al “Drivetrain Noise and Vibration Troubleshooting,” SAE 2001-01-2809
- Du, H.Y. I. et al “Modeling and Correlation of Driveshaft Whirl Dynamics for RWD Sport Utility Vehicles,” SAE 2001-01-1503 , 2001 SAE Noise & Vibration Conference
- Du, H.Y. I. et al “Dynamic Stress Correlation and Modeling of Driveline Bending Integrity for 4WD Sport Utility Vehicles,” SAE 2002-01-1044 , 2002 SAE World Congress
- “Driveline Noise and Vibration Vehicle Level Allocatable Tests (VLAT),” Test Procedure GMUTS L-15-313 1995 GMNA ADV Internal Procedure
- “Driveline Noise and Vibration Powertrain Level Allocatable Tests (PLAT),” Test Procedure GMUTS L-15-329 2001 GMNA ADV Internal Procedure
- Taylor, C.F. The Internal-Combustion Engine in Theory and Practice 2 Combustion, Fuels, Materials, Design MIT Poress 1985 240 275
- “Powertrain Balance Class,” 1994 GMNA Powertrain Internal Publication
- Stout, J. “Valvetrain Unbalance and Its Effects on Powertrain NVH,” SAE Paper 971993 , 1997 SAE Noise & Vibration Conference
- Eichhorn, U. Schonfeld, H. “The Valvetrain of Internal Combustion Engines as a Source of Vibrations - Experimental Results and a Method of Calculation,” SAE 905172 , 23 rd FISTA Congress